Ministry of Health, Labor and Welfare notifies priority supply of measles vaccine to pediatric departments for routine vaccinations. Measles is a viral infection that is extremely contagious and can cause symptoms in almost 100% of people who do not have immunity.

Since there is no specific drug, it is important to prevent infection with vaccines. In Japan, pre-school children can be vaccinated at public expense as a "routine vaccination," but some children may not receive it depending on their age..